If you want to avoid this you can disable it in the configuration file :
FQDN :
find_subs : True #will try to get subs when FQDN from ip is found
get_fqdn_trough_proxy: False #will try to get fqdn trough proxy (All API)
get_from_cert : False#connection to target will be made during initial scan <---------- HERE
I will try to optimize this in next releases
If you want to avoid this you can disable it in the configuration file :